Insights

Engineering notes on EV charging, load management and site power

Plain-language guides for strata committees, fleet and workshop managers, facility teams and electrical contractors: how to charge more cars on the supply a site already has, what the standards and tariffs mean, and how the engineering works.

Integration13 min read

EV charger BMS integration: Modbus, MQTT and BACnet in practice

Integrate EV charging with a building management system by letting the BMS read EV power, per-phase current, charger status and alarms, and at most write a site cap that the on-site charging controller enforces. Modbus TCP is the usual path, BACnet normally needs a gateway, and MQTT suits telemetry.

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Integration13 min read

OCPP proxy or on-site CSMS? Adding load management to a charging site

An OCPP proxy sits between chargers and an existing cloud CSMS so a site controller can add load management; an on-site CSMS replaces the cloud link instead. Here is how each works at message level, what happens when the internet drops, and how to choose.

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